Battery doorbell



FIG. 1 is a perspective view of a battery doorbell showing our newdesign;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top side view thereof;

FIG. 5 is a bottom side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The broken lines shown in the drawings are for the purpose ofillustrating portions of the battery doorbell that form no part of theclaimed design.

CLAIM The ornamental design for a battery doorbell, as shown and described. 